The ultimate Calculator has to be WolframAlpha which as you can see has a page of its own with several slideshows to help you learn how to use it.
For drawing and exploring graphs, use the outstanding Desmos Graphing Calculator.
For some other useful calculators and tools and accompanying notes see the following pages……….
The pages in the series:
- Calculator Collections
- Calculator Manuals
- Classwiz Tutorials
- Specialist Calculators
- Casio CG50 Graphical Calculator
- Order of Operations
- Standard Form
- Equations: Linear & Quadratic
- Statistics – Diagrams
- Statistics 16+
- Decision Mathematics